Internet Engineering Task Force (IETF) F. Brockners
Request for Comments: 6736 S. Bhandari
Category: Standards Track Cisco
ISSN: 2070-1721 V. Singh
V. Fajardo
Telcordia Technologies
October 2012
Diameter Network Address and Port Translation Control Application
Abstract
This document describes the framework, messages, and procedures for
the Diameter Network address and port translation Control
Application. This Diameter application allows per-endpoint control
of Network Address Translators and Network Address and Port
Translators, which are added to networks to cope with IPv4 address
space depletion. This Diameter application allows external devices
to configure and manage a Network Address Translator device --
expanding the existing Diameter-based Authentication, Authorization,
and Accounting (AAA) and policy control capabilities with a Network
Address Translator and Network Address and Port Translator control
component. These external devices can be network elements in the
data plane such as a Network Access Server, or can be more
centralized control plane devices such as AAA-servers. This Diameter
application establishes a context to commonly identify and manage
endpoints on a gateway or server and a Network Address Translator and
Network Address and Port Translator device. This includes, for
example, the control of the total number of Network Address
Translator bindings allowed or the allocation of a specific Network
Address Translator binding for a particular endpoint. In addition,
it allows Network Address Translator devices to provide information
relevant to accounting purposes.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6736.
Brockners, et al. Standards Track [Page 1]RFC 6736 Diameter NAT Control Application October 2012Copyright Notice
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Table of Contents
1. Introduction ....................................................4
2. Conventions .....................................................6
3. Deployment Framework ............................................7
3.1. Deployment Scenario ........................................7
3.2. Diameter NAPT Control Application Overview .................9
3.3. Deployment Scenarios for DNCA .............................10
4. DNCA Session Establishment and Management ......................12
4.1. Session Establishment .....................................13
4.2. Session Update ............................................16
4.3. Session and Binding Query .................................18
4.4. Session Termination .......................................20
4.5. Session Abort .............................................21
4.6. Failure Cases of the DNCA Diameter Peers ..................22
5. Use of the Diameter Base Protocol ..............................23
5.1. Securing Diameter Messages ................................23
5.2. Accounting Functionality ..................................24
5.3. Use of Sessions ...........................................24
5.4. Routing Considerations ....................................24
5.5. Advertising Application Support ...........................24
6. DNCA Commands ..................................................25